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DOWNLOAD
CALIBRATION
INSTRUCTIONS

GRO Calibration Kit
 

 

 

 
 
 

 

 

    ● Gasoline,

    ● Kerosene,

    ● Fuel Oils

    ● Gas Condensates,

    ● UST Removals, Remediation,

    ● Groundwater Monitoring,

    ● Benzene + Other Light-Refined

       Petroleum Contaminants

 

Sitelab’s GRO calibration kit CAL-025 is used to measure BTEX and other volatile petroleum hydrocarbons in the C6 to C10 range.  This test matches well to U.S. EPA and other regulatory methods for GRO, VPH, BTEX or VOCs using Gas Chromatography instrumentation.

 

 

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UVF-TRILOGY Performance 

  

This performance study compares UVF-TRILOGY to the UVF-3100 analyzer.  Both instruments are fitted with similar optical filters and produce accurate results over a wide range of contaminants.  Samples only take a few minutes to extract in solvent and analyze.  Minimum detection limit is 0.5 ppm.

 

Open PDF File

The UVF-TRILOGY was designed to replicate and replace Sitelab's UVF-3100 models.  The case studies listed below highlight the accuracy using this instrument for past projects.

  

 

 

Evaluation Study, Page 2

  

 

GRO & VPH Accuracy at UST Site

Evaluation study performed by customer testing soil samples at a former gas station in Massachusetts.  They wanted to know how Sitelab's GRO test compares to two different laboratory methods, GRO and VPH, commonly used in the United States and elseware.  Sitelab correlated well to both methods.



See case study
    
 
Performance Testing GRO in Water

Sitelab's UVF-3100 performed well testing blind, NELAC certified, spiked water samples provided by Environmental Resource Associates (Arvada, CO).  Results were compared to the GRO in water concentrations reported by 83 participating laboratories using a variety of gas chromatography methods.

»SEE OIL IN WATER PERFORMANCE STUDY



 

 
 
 

U.S. EPA GRO in Soil Performance

As part of the U.S. Environmental Protection Agency's TPH in Soil Evaluation Study, a group of soils were spiked in triplicate with weathered gasoline having variable concentrations.  Weathered gasoline contains BTEX and other volatile petroleum hydrocarbons, which make up the GRO fraction found in total petroleum hydrocarbons.  Results were compared to a certified laboratory who performed SW-846 Method 8015B.  EPA evaluated Sitelab's UVF-3100A and six other manufacturers during the program.

Soils from Kelly Air Force Base in San Antonio, Texas, were analyzed for GRO as part of the study.  Samples were collected from an active underground storage tank (UST) farm that serves as the government vehicle refueling station at the base.  Soils tested consisted of sandy clays with silty sand and gravel. 

EPA reported that for GRO measurement bias "seven of the eight UVF-3100A results were within 50 percent of the reference method result," page 66.  SOURCE: EPA/600/R-01/080

 
»Download U.S. EPA Report

   

Still using a PID to Screen Soils?

"Jar Headspace" using photo ionization detectors (PIDs) is common practice for field screening soils contaminated with petroleum hydrocarbons.  PIDs detect air vapors in soil for volatile organic compounds.  Despite their popularity, however, PIDs can often give false readings.  Data shown here compares GRO to PID concentrations testing soils contaminated by weathered gasoline.  Grab samples were collected from borings in 1 to 2 foot intervals and then screened using a PID and UVF to delineate the vertical subsurface extent of contamination.Not surprisingly, results did not correlate very well.
 
 

 

 

 

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